Nut supply apparatus to bonding machine

Abstract

A supply chute 11 has a nut send-in port 14 at its upper end, and is composed of an inclined chute 12 inclined obliquely downward, and a curved chute 13 coupled to the lower end of the inclined chute 12 and curved like an arc obliquely downward. A nut support mechanism 40 is disposed at a nut send-out port 15 provided at a terminal end of the curved chute 13 , for supporting the nuts 60 being forwarded so that their bonding side 62 may be in an oblique downward position nearly orthogonal to the axial line of a guide rod 20 . The inclined chute 12 , the curved chute 13 , the guide rod 20, and driving means 25 for moving the guide rod 20 back and forth in an oblique downward direction are mounted on a stand 22 installed rotatably on a support member 33 by way of a horizontal support shaft 35 , and the support member 33 is coupled and fixed to a main body arm 2 of the bonding machine 1 . When the guide rod 20 moves forward obliquely downward, the holding pin 21 protruded on the front end of the guide rod 20 penetrates through screw holes 61 of the nuts 60 supported on the support mechanism 40 , and pieces through and holds, and the leading end of the holding pin 21 approaches and moves to the leading end of a positioning pin 5 , and the screw holes 61 of the nuts 60 held on the holding pin 21 are supplied in fitting with the positioning pin 5.

1. A nut supply apparatus to a bonding machine comprising a nut send-out port provided at a terminal end of a supply chute inclined downward so that a plurality of nuts may be supplied continuously in parallel in a same direction, and a holding pin for piercing and holding through the nuts protruded at a front end of a guide rod disposed movably back and forth in an oblique downward direction while intersecting with the nut send-out port, by penetrating through screw holes of the nuts supported at the nut send-out port, wherein when the guide rod moves forward in an oblique downward direction, and the leading end of the holding pin approaches and moves to a bonding position of the bonding machine, the nuts held on the holding pin are supplied by fitting with a positioning pin provided at the bonding position,
 the supply chute is composed of an inclined chute inclined obliquely downward, having a nut send-in port at its upper end for sending in the bonding side of the nuts in an upward position, and a curved chute coupled to the lower end of the inclined chute and curved like an arc obliquely downward, 
 a nut support mechanism is disposed at the nut send-out port disposed at a terminal end of the curved chute, for supporting the nuts being forwarded so that their bonding side may be in an oblique downward position nearly orthogonal to the axial line of the guide rod, and 
 the inclined chute, the curved chute, the guide rod, and driving means for moving the guide rod back and forth in an oblique downward direction are mounted on a stand installed rotatably on a support member by way of a horizontal support shaft, the support member is coupled and fixed to the bonding machine, and
 when the guide rod moves forward obliquely downward, the holding pin penetrates through the screw holes of the nuts supported on the support mechanism, and pieces through and holds the nuts, the leading end of the holding pin approaches and moves to the leading end of the positioning pin, and the screw holes of the nuts held on the holding pin are supplied in fitting with the positioning pin. 
 
 
     
     
       2. The nut supply apparatus to the bonding machine of  claim 1 , wherein the guide rod and the driving means for moving the guide rod back and forth obliquely downward are mounted on the stand, and the inclined chute and the curved chute are mounted rotatably on the stand by way of a second horizontal support shaft. 
     
     
       3. The nut supply apparatus to the bonding machine of  claim 1 , wherein the nut support mechanism is provided with a pair of detent pawls to be opened and closed for supporting the nuts at a specified position. 
     
     
       4. The nut supply apparatus to the bonding machine of  claim 1 , wherein the driving means of the guide rod is an air cylinder, and the forwarding position of the guide rod in an oblique downward direction is defined by a stopper protruded on the guide rod by abutting against the stand, and is adjusted to approach and move exactly at the leading end of the positioning pin of the bonding machine at the leading end of the holding pin protruded at the front end of the guide rod. 
     
     
       5. The nut supply apparatus to the bonding machine of  claim 1 , wherein a nut passing groove of the inclined chute is opened and provided at the upper side, so that the nuts positioned in the nut passing groove may be seen through. 
     
     
       6. The nut supply apparatus to the bonding machine of  claim 1 , wherein the bonding machine is a spot welding machine. 
     
     
       7. The nut supply apparatus to the bonding machine of  claim 1 , wherein the bonding machine is an automatic crimping machine of clinch nuts.